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A substance, C8H11NO3, both a hormone and neurotransmitter, that is secreted by the adrenal medulla and the nerve endings of the sympathetic nervous system and causes vasoconstriction and increases in heart rate, blood pressure, and the sugar level of the blood. Also called noradrenaline.
(Biochemistry) the US name for noradrenaline
nor•ep•i•neph•rine(ˌnɔr ɛp əˈnɛf rɪn, -rin)
a neurotransmitter that is similar to epinephrine, acts to constrict blood vessels and dilate bronchi, used esp. in medical emergencies to raise blood pressure.
(or noradrenaline) A neurotransmitter affecting various kinds of activity in the body, including blood flow.
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|Noun||1.||norepinephrine - a catecholamine precursor of epinephrine that is secreted by the adrenal medulla and also released at synapses|
pressor, vasoconstrictive, vasoconstrictor - any agent that causes a narrowing of an opening of a blood vessel: cold or stress or nicotine or epinephrine or norepinephrine or angiotensin or vasopressin or certain drugs; maintains or increases blood pressure
monoamine neurotransmitter - a monoamine that is functionally important in neural transmission
catecholamine - any of a group of chemicals including epinephrine and norepinephrine that are produced in the medulla of the adrenal gland